2 năm trước cách đây · bbf3ccea5f
--- a/day12/src/com/lovecoding/filter/JSPFilter.java
+++ b/day12/src/com/lovecoding/filter/JSPFilter.java
@@ -0,0 +1,28 @@
 
				+package com.lovecoding.filter;
			
 
				+
			
 
				+import javax.servlet.*;
			
 
				+import java.io.IOException;
			
 
				+
			
 
				+public class JSPFilter implements Filter{
			
 
				+
			
 
				+    @Override
			
 
				+    public void init(FilterConfig filterConfig) throws ServletException {
			
 
				+
			
 
				+    }
			
 
				+
			
 
				+    @Override
			
 
				+    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
			
 
				+
			
 
				+        System.out.println( "run 1" );
			
 
				+
			
 
				+        filterChain.doFilter(servletRequest, servletResponse);
			
 
				+
			
 
				+        System.out.println( "run 3" );
			
 
				+
			
 
				+    }
			
 
				+
			
 
				+    @Override
			
 
				+    public void destroy() {
			
 
				+
			
 
				+    }
			
 
				+}
			
--- a/day12/src/com/lovecoding/filter/LoginFilter.java
+++ b/day12/src/com/lovecoding/filter/LoginFilter.java
@@ -0,0 +1,21 @@
 
				+package com.lovecoding.filter;
			
 
				+
			
 
				+import javax.servlet.*;
			
 
				+import javax.servlet.annotation.WebFilter;
			
 
				+import java.io.IOException;
			
 
				+
			
 
				+@WebFilter("/login.jsp")
			
 
				+public class LoginFilter implements Filter {
			
 
				+    @Override
			
 
				+    public void init(FilterConfig filterConfig) throws ServletException {
			
 
				+
			
 
				+    }
			
 
				+    @Override
			
 
				+    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
			
 
				+        System.out.println( "LoginFilter Runing" );
			
 
				+        filterChain.doFilter(servletRequest, servletResponse);
			
 
				+    }
			
 
				+    @Override
			
 
				+    public void destroy() {
			
 
				+    }
			
 
				+}
			
--- a/day12/src/com/lovecoding/filter/MyFilter.java
+++ b/day12/src/com/lovecoding/filter/MyFilter.java
@@ -0,0 +1,24 @@
 
				+package com.lovecoding.filter;
			
 
				+
			
 
				+
			
 
				+import javax.servlet.*;
			
 
				+import java.io.IOException;
			
 
				+
			
 
				+public class MyFilter implements Filter {
			
 
				+
			
 
				+    @Override
			
 
				+    public void init(FilterConfig filterConfig) throws ServletException {
			
 
				+        System.out.println( "init" );
			
 
				+    }
			
 
				+
			
 
				+    @Override
			
 
				+    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
			
 
				+        System.out.println( "doFilter" );
			
 
				+        filterChain.doFilter( servletRequest, servletResponse );
			
 
				+    }
			
 
				+
			
 
				+    @Override
			
 
				+    public void destroy() {
			
 
				+        System.out.println( "destroy" );
			
 
				+    }
			
 
				+}
			
--- a/day12/web/WEB-INF/lib/servlet-api.jar
+++ b/day12/web/WEB-INF/lib/servlet-api.jar
--- a/day12/web/WEB-INF/web.xml
+++ b/day12/web/WEB-INF/web.xml
@@ -0,0 +1,48 @@
 
				+<?xml version="1.0" encoding="UTF-8"?>
			
 
				+<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
			
 
				+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
			
 
				+         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
			
 
				+         version="4.0">
			
 
				+
			
 
				+
			
 
				+<filter>
			
 
				+    <filter-name>JSPFilter</filter-name>
			
 
				+    <filter-class>com.lovecoding.filter.JSPFilter</filter-class>
			
 
				+</filter>
			
 
				+<filter-mapping>
			
 
				+    <filter-name>JSPFilter</filter-name>
			
 
				+    <url-pattern>/admin.jsp</url-pattern>
			
 
				+</filter-mapping>
			
 
				+
			
 
				+
			
 
				+<!--  我们可以在web.xml里面定义 Filter 对象  -->
			
 
				+<filter>
			
 
				+    <filter-name>Demo</filter-name>
			
 
				+    <filter-class>com.lovecoding.filter.MyFilter</filter-class>
			
 
				+</filter>
			
 
				+<!--  这里定义一个URL匹配 讲匹配上的 请求转给Filter 处理  -->
			
 
				+<filter-mapping>
			
 
				+    <filter-name>Demo</filter-name>
			
 
				+    <url-pattern>/*</url-pattern>
			
 
				+</filter-mapping>
			
 
				+
			
 
				+<!--  只匹配JSP过滤  -->
			
 
				+<filter-mapping>
			
 
				+    <filter-name>Demo</filter-name>
			
 
				+    <url-pattern>*.jsp</url-pattern>
			
 
				+</filter-mapping>
			
 
				+
			
 
				+<!--  只匹配JSP过滤  -->
			
 
				+<filter-mapping>
			
 
				+    <filter-name>Demo</filter-name>
			
 
				+    <url-pattern>/index.jsp</url-pattern>
			
 
				+</filter-mapping>
			
 
				+
			
 
				+<!--  只匹配JSP过滤  -->
			
 
				+<filter-mapping>
			
 
				+    <filter-name>Demo</filter-name>
			
 
				+    <url-pattern>/admin/*</url-pattern>
			
 
				+</filter-mapping>
			
 
				+
			
 
				+
			
 
				+</web-app>
			
--- a/day12/web/admin.jsp
+++ b/day12/web/admin.jsp
@@ -0,0 +1,26 @@
 
				+<%--
			
 
				+  Created by IntelliJ IDEA.
			
 
				+  User: 武恒
			
 
				+  Date: 2023/2/9
			
 
				+  Time: 14:25
			
 
				+  To change this template use File | Settings | File Templates.
			
 
				+--%>
			
 
				+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
			
 
				+<html>
			
 
				+<head>
			
 
				+    <title>Title</title>
			
 
				+</head>
			
 
				+<body>
			
 
				+
			
 
				+
			
 
				+    <h1> Admin.JSP </h1>
			
 
				+
			
 
				+    <%
			
 
				+
			
 
				+        System.out.println( "run 2" );
			
 
				+
			
 
				+    %>
			
 
				+
			
 
				+
			
 
				+</body>
			
 
				+</html>
			
--- a/day12/web/index.jsp
+++ b/day12/web/index.jsp
@@ -0,0 +1,16 @@
 
				+<%--
			
 
				+  Created by IntelliJ IDEA.
			
 
				+  User: 武恒
			
 
				+  Date: 2023/2/9
			
 
				+  Time: 14:04
			
 
				+  To change this template use File | Settings | File Templates.
			
 
				+--%>
			
 
				+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
			
 
				+<html>
			
 
				+  <head>
			
 
				+    <title>$Title$</title>
			
 
				+  </head>
			
 
				+  <body>
			
 
				+  $END$
			
 
				+  </body>
			
 
				+</html>
			
--- a/day12/web/login.jsp
+++ b/day12/web/login.jsp
@@ -0,0 +1,16 @@
 
				+<%--
			
 
				+  Created by IntelliJ IDEA.
			
 
				+  User: 武恒
			
 
				+  Date: 2023/2/9
			
 
				+  Time: 15:13
			
 
				+  To change this template use File | Settings | File Templates.
			
 
				+--%>
			
 
				+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
			
 
				+<html>
			
 
				+<head>
			
 
				+    <title>Title</title>
			
 
				+</head>
			
 
				+<body>
			
 
				+<h1>login JSP</h1>
			
 
				+</body>
			
 
				+</html>
			
--- a/study/src/com/lovecoding/study/filter/SessionFilter.java
+++ b/study/src/com/lovecoding/study/filter/SessionFilter.java
@@ -0,0 +1,57 @@
 
				+package com.lovecoding.study.filter;
			
 
				+
			
 
				+import com.lovecoding.study.domian.User;
			
 
				+
			
 
				+import javax.servlet.*;
			
 
				+import javax.servlet.annotation.WebFilter;
			
 
				+import javax.servlet.http.HttpServletRequest;
			
 
				+import javax.servlet.http.HttpServletResponse;
			
 
				+import javax.servlet.http.HttpSession;
			
 
				+import java.io.IOException;
			
 
				+
			
 
				+@WebFilter("/*")
			
 
				+public class SessionFilter implements Filter {
			
 
				+
			
 
				+    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
			
 
				+
			
 
				+        HttpServletRequest req = (HttpServletRequest) servletRequest;
			
 
				+        HttpServletResponse resp = (HttpServletResponse) servletResponse;
			
 
				+        req.setCharacterEncoding("utf-8");
			
 
				+        resp.setContentType("text/html; charset=utf-8");
			
 
				+
			
 
				+        /**
			
 
				+         * 我们在这里增加判断 有些页面是不需要鉴权的
			
 
				+         * 比如说 登陆 注册 都不需要鉴权
			
 
				+         */
			
 
				+        String requestURI = req.getRequestURI();
			
 
				+
			
 
				+        String[] urls = {"/login.jsp", "/user", "/css/login.css", "/css/register.css"};
			
 
				+        for ( String url : urls ) {
			
 
				+            if (requestURI.contains(url)) {
			
 
				+                filterChain.doFilter(servletRequest, servletResponse);
			
 
				+                return;
			
 
				+            }
			
 
				+        }
			
 
				+
			
 
				+        /**
			
 
				+         * 我们在这里取出 用户的 Session对象
			
 
				+         */
			
 
				+        HttpSession session = req.getSession(true);
			
 
				+        User user = (User) session.getAttribute("user");
			
 
				+        if ( user == null ) {
			
 
				+            //用户未登录
			
 
				+            session.setAttribute("error", "请登陆后操作!!!!!!!");
			
 
				+            resp.sendRedirect(req.getContextPath() + "/login.jsp");
			
 
				+        } else {
			
 
				+            //能查到 Session 里的 User对象 是 已经登陆的了
			
 
				+            filterChain.doFilter(servletRequest, servletResponse);
			
 
				+        }
			
 
				+    }
			
 
				+
			
 
				+
			
 
				+
			
 
				+    public void init(FilterConfig filterConfig) throws ServletException {
			
 
				+    }
			
 
				+    public void destroy() {
			
 
				+    }
			
 
				+}